The corona virus (Covid-19) has attacked almost the entire world, including Indonesia. Places where community activities must comply with health protocols, one of which is checking human body temperature. The measurement of human body sensors is a very significant difference even though it is applied to the same human body, this is due to several factors. This research analyzes the measurement results of the human body temperature sensor. This study aims to determine an effective and efficient human body temperature sensor. The process of measuring human body temperature uses a microcontroller-based temperature sensor. After the results of temperature measurements using different temperature sensors are obtained, the measurement results are analyzed and compared to obtain an effective and efficient temperature sensor. Based on the analysis, the results of measuring human body temperature using a thermal camera are an effective and efficient sensor.

Measurement results of load cell sensors sometimes has a significant difference even have the same weight, this is usually caused by several factors that affect the difference in the measured value, therefore on In this research, an analysis of the measurement results of a load will be carried out with the measuring object, namely rice, package and fruit. This analysis is carried out to determine the load which object is more efficient and accurate in do some weight calculation. The process of measuring weight using a load cell sensor is carried out based on Arduino device. After the measurement results are obtained then they are analyzed and compared between the measurement results of rice, package and fruit to determine the level of efficiency of the load cell sensor. Based on the experimental results of fruit, the measurement between the results to the real value is 4%. The measurement results of fruit have the efficiency of the load cell sensor

Pemupukan adalah bagian penting dari budidaya padi. Kebutuhan pupuk nitrogen yang tidak tepat dan tidak terukur akan menjadi faktor pengurang optimalnya produksi pertanian. Penelitian ini bertujuan untuk mengetahui pengaruh identifikasi kebutuhan pupuk nitrogen menggunakan Bagan Warna Daun (BGD) pada tanaman padi. Group eksperimental pada penelitian ini menggunakan media pendukung Microcontroller NodeMcu sebagai pemroses identifikasi warna daun padi dan sekaligus menentukan data kebutuhan pupuk Nitrogen. Informasi kebutuhan pupuk Nitrogen tersimpan di internet berbasis Internet On Things (IOT) dan dapat diakses menggunakan website. Penelitian ini dilakukan pada petani di desa lumbung padi di Jawa Tengah. Berdasarkan analisis data dan pembahasan hasil penelitian diperoleh hasil t­­hitung ≥ ttabel yaitu 2,976 ≥ 2,262  maka H0 ditolak atau H1 diterima sehingga dapat disimpulkan bahwa pengaruh identifikasi kebutuhan pupuk Nitrogen menggunakan bagan warna daun (BGD) berbasis Internet On Things (IOT) terhadap tanaman padi dapat diterima dan efektifitas dosis penggunakan pupuk menjadi lebih efisien 50%.

Production of freshwater fish farming (ponds) in Kangkung Subdistrict in 2015 reached 4.42 tons or valued at 97.19 million rupiah and the condition is growing more and more. The number of fish seeds is measured conventionally by observing the senses of the eye and causing inaccurate (inaccurate) measurement results. This study offers a solution for counting fish by using a microcontroller based phototransistor technology. Phototransistor has a linear function of the received light intensity that is flowing current (ON) and if there is a condition of light intensity blocked by fish passing through it then the current does not flow (OFF). The trial results of the fish seed count tool have an accuracy of 97% so that it can be used by fish farmers.
 

Number of fish seed can be measured by means of conventional observation using eye senses. But when the fish seed measured pretty much it will take a long time (not efficient) and cause incorrect measurement results (inaccurate). The accuracy of calculation of fingerlings is crucial trust between seller and buyer.During this time a sensor is used to detect the amount of fish seed is passed through a transparent hose using a light sensor (Light Dependent Resistor) and photodiode sensors as infra red light receiver. The level of accuracy of the sensor lies in the intensity of the light beam is received so that the sensor will be impaired if airya murky and there are air bubbles pass through the sensor so that the fish count error occurs.This research will be conducted design counters the number of fingerlings using infra red phototransistor sensor with a frequency of 20KHz to fish and then processed using the logic matrix. Results matrix logic into the data input to be processed by a microcontroller as the basis of results of calculation of the amount of fish.Development model studies using models of R & D (research and development) that produce a product in the form of the final product. Experiments were carried out using the type and length of catfish fingerlings with a length of 3 cm to 5 cm. Fish seed count tool has been tested to catfish farmers in the village Siwarak Ungaran City.The trial results calculators fish seeds have difference of 3% of the calculated results Manual or accuracy of calculation results have fish reaches 97%, then a counter of fish seed is acceptable to be used by catfish farmers.